<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>3-3 Vue.extend</title>
</head>
<body>
<div id="app1">app1:{{title}}</div>
<div id="app2">app2:{{title}}</div>
</body>
<script src="./js/vue.js"></script>
<script>
  var Vue2=Vue.extend({
    data(){
      return {title:'hello'}
    }
  })
  var vm1=new Vue({el: '#app1'})
  var vm2=new Vue2({el:'#app2'})
</script>
</html>